CN103612548A - Hydro-pneumatic suspension mechanism for engineering vehicle - Google Patents

Abstract

The invention relates to the technical field of suspension systems for engineering vehicles, and discloses an oil-pneumatic suspension mechanism for engineering vehicles, which includes a slewing bearing, a suspension body, an oil-pneumatic suspension cylinder, a balance arm, an axle rear seat and an axle, and the inner and outer rings of the slewing bearing are respectively Connect the suspension body to the frame of the engineering vehicle; the upper end of the oil-pneumatic suspension cylinder is connected to the upper part of the suspension body, and the lower end is connected to the balance arm; one end of the balance arm is connected to the lower end of the suspension body, and the other end is connected to the rear seat of the axle. They are respectively connected with the balance arm and the rear seat of the axle. The invention adopts the oil-pneumatic suspension oil cylinder, which has the function of oil-pneumatic spring and better damping performance, adopts the structure of slewing support, suspension body, balance arm, axle rear seat and axle, and is suitable for high speed, large lifting stroke, uneven road surface Large unevenness and other working conditions make the force on each tire of the engineering vehicle balanced when driving, and the vehicle runs smoothly, so that the force direction of the tire is always perpendicular to the road surface, and the tire wears evenly, prolonging the service life of the tire.

Description

Oil and gas suspension mechanism for engineering vehicles

technical field

The invention relates to the technical field of suspension systems for engineering vehicles, and more specifically, to an oil-air suspension mechanism for engineering vehicles.

Background technique

As an important part of engineering vehicles, the suspension mechanism connects the frame with the axle or wheels, transmits the force and moment acting between the wheels and the frame, buffers the impact force transmitted from the uneven road to the frame, and attenuates The vibration caused by this will ensure the smooth running of the vehicle.

The hydraulic suspension device used in the existing engineering transport vehicles is mainly composed of suspension body, ordinary suspension oil cylinder, balance arm and other components. The lifting range is not too large, and the applicable road conditions are generally better. At present, there is no suspension mechanism that is suitable for large-stroke lifting, high-speed driving, and uneven roads, and requires good driving comfort.

Contents of the invention

The object of the present invention is to provide an oil-pneumatic suspension mechanism for engineering vehicles that is suitable for working conditions such as high speed, large lifting stroke, and large unevenness of the road surface, and has good reliability and comfort.

In order to solve the above-mentioned problems, the technical solution adopted by the present invention is: an oil-pneumatic suspension mechanism for engineering vehicles, the suspension mechanism includes a slewing bearing, a suspension body, an oil-pneumatic suspension cylinder, a balance arm, a rear seat of an axle, and an axle. The inner and outer rings of the slewing bearing are respectively connected to the suspension body and the frame of the engineering vehicle; the upper end of the oil-pneumatic suspension cylinder is connected to the upper part of the suspension body, and the lower end is connected to the balance arm; one end of the balance arm is connected to the lower end of the suspension body , the other end of which is connected to the rear seat of the axle, and the axle is also connected to the balance arm and the rear seat of the axle respectively.

According to a preferred embodiment of the present invention: the upper end surface of the suspension body is provided with a protruding support; the lower end of the oil-pneumatic suspension cylinder is connected to the middle part of the balance arm through a first pin, and its upper end is connected through a second The pin shaft is connected with the support on the upper end surface of the suspension body, and the axis of the oil-air suspension oil cylinder passes through the center of the axle when the vehicle is in normal working condition.

According to a preferred embodiment of the present invention: the balance arm and the rear seat of the axle are connected by bolts to form a "П"-shaped structure.

According to a preferred embodiment of the present invention: one end of the balance arm is connected to the lower end of the suspension body through a balance arm pin, and when the oil-pneumatic suspension oil cylinder is stretched, the balance arm, the rear seat of the axle and the axle are surrounded together The balance arm pin rotates.

According to a preferred embodiment of the present invention: the inner ring of the slewing support is connected to the upper end surface of the suspension body by bolts, and the outer ring is connected to the frame of the engineering vehicle by bolts.

According to a preferred embodiment of the present invention: the axle is respectively connected to the rear seat of the axle and the balance arm through a first axle shaft and a second axle axle, and the axle can surround the first axle axle and the balance arm. The second axle shaft turns.

According to a preferred embodiment of the present invention: it further includes a limit block arranged on the balance arm for limiting the lateral swing angle of the axle around the first axle axis and the second axle axis.

According to a preferred embodiment of the present invention: the balance arm, the rear seat of the axle, the axle, the first axle shaft and the second axle shaft together form a closed box-shaped structure.

Compared with the prior art, the beneficial effect of the present invention is that: the present invention adopts oil-pneumatic suspension oil cylinder, has the function of oil-pneumatic spring, has better vibration damping performance, and adopts slewing bearing, suspension body, balance arm, axle rear seat And the structure of the axle is suitable for working conditions such as high speed, large lifting stroke, and large unevenness of the road surface. It can make the force of each tire of the engineering vehicle more balanced when driving, and the vehicle runs more smoothly, and the direction of the force of the tire is always Perpendicular to the road surface, so that the tires wear evenly and the tire life is extended.

Description of drawings

Fig. 1 is the front view of the oil-pneumatic suspension mechanism for engineering vehicles of the present invention.

Fig. 2 is a side view of the oil-pneumatic suspension mechanism for engineering vehicles of the present invention.

Explanation of reference signs: 1, slewing bearing, 2, suspension body, 3, oil-pneumatic suspension oil cylinder, 4, limit block, 5, balance arm, 6, axle rear seat, 7, first axle shaft, 8, vehicle Bridge, 9, the second axle shaft, 10, the balance arm pin, 11, the first pin, 12, the second pin.

Detailed ways

In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

It should be noted that, in this embodiment, when a certain element is said to be connected to another element, it can be fixedly connected or flexibly connected (such as in the form of a hinge) according to actual needs.

Referring to Fig. 1 and Fig. 2, the present invention provides an oil-pneumatic suspension mechanism for engineering vehicles, which suspension mechanism includes a slewing bearing 1, a suspension body 2, an oil-pneumatic suspension cylinder 3, a balance arm 5, an axle rear seat 6 and an axle 8. Among them, the inner and outer rings of the slewing bearing 1 are respectively connected to the suspension body 2 and the frame of the engineering vehicle (not shown in the figure); the upper end of the oil-pneumatic suspension cylinder 3 is connected to the upper part of the suspension body 2, and its lower end is connected to the balance arm 5 One end of the balance arm 5 is connected with the lower end of the suspension body 2, and its other end is connected with the axle rear seat 6, and the axle 8 is also connected with the balance arm 5 and the axle rear seat 6 respectively.

In the present invention, due to the adoption of the oil-pneumatic suspension oil cylinder 3, it has the function of an oil-pneumatic spring and has better damping performance, and adopts the components of the slewing bearing 1, the suspension body 2, the balance arm 5, the rear seat of the axle 6 and the axle 8. The structure is suitable for working conditions such as high speed, large lifting stroke, and large unevenness of the road surface. It can make the force on each tire of the engineering vehicle more balanced when the vehicle is running, and the vehicle runs more smoothly, and the force direction of the tire is always perpendicular to the road surface. In this way, the tire wears evenly and the service life of the tire is extended.

Moreover, the oil-pneumatic suspension oil cylinder 3 also has the function of an ordinary oil cylinder, so that the whole suspension mechanism can realize the lifting of the vehicle axle 8 under the action of the hydraulic system, not only can realize the lifting of the vehicle platform, but also can be used when a certain suspension mechanism or tires appear. Lift this suspension in the event of a breakdown and continue driving to the repair location without the need for other vehicles or auxiliary towing.

At the same time, compared with the prior art, this embodiment omits the special large accumulator outside the oil-pneumatic suspension oil cylinder 3, so that the entire suspension mechanism is very simple, reasonable in layout, and convenient for installation, maintenance and repair.

In this embodiment, the upper end surface of the suspension body 2 is provided with a protruding support; the lower end of the oil-air suspension oil cylinder 3 is connected with the middle part of the balance arm 5 through a first pin shaft 11, and its upper end is connected with the middle part of the balance arm 5 through a second pin shaft 12. The bearing on the upper end surface of the suspension body 2 is connected; and the axis of the oil-pneumatic suspension oil cylinder 3 passes through the center of the vehicle axle 8 when the vehicle is in normal working conditions. When in use, compared with the existing hydraulic suspension mechanism, the suspension body can be 2. The force bearing of the balance arm 5 and the rear seat 6 of the axle is better.

Among them, the setting of the protruding support is used to install the upper end of the oil-pneumatic suspension oil cylinder 3. Compared with the existing hydraulic suspension mechanism, which supports the upper end of the oil cylinder on the lower part of the upper plane of the suspension body, the stroke of the oil-air suspension oil cylinder 3 is increased. , can make the suspension mechanism better adapt to the unevenness of the road.

In this embodiment, specifically, the inner ring of the slewing bearing 1 is connected to the upper end surface of the suspension body 2 by bolts, and its outer ring is connected to the frame of the engineering vehicle (not shown in the figure) by bolts, so that the external The steering mechanism realizes the independent rotation of the suspension mechanism.

One end of the balance arm 5 is connected to the lower end of the suspension body 2 through a balance arm pin 10, and when the oil-pneumatic suspension oil cylinder 3 expands and contracts, the balance arm 5, the axle rear seat 6 and the axle 8 surround the balance together. The arm pin shaft 10 rotates; and then realizes the lifting of the vehicle axle 8 or the lifting of the engineering vehicle platform.

The said axle 8 is respectively connected with the axle rear seat 6 and the balance arm 5 through the first axle shaft 7 and the second axle shaft 9, and the axle 8 can surround the first axle shaft 7 and the second axle shaft. The axle shaft 9 rotates; thus, the axle 8 can be laterally swung at a certain angle around the center of the axle axle to adapt to the lateral unevenness of the road surface.

This embodiment can also include a limit block 4 that is arranged on the balance arm 5 to limit the lateral swing angle of the axle 8 around the first axle shaft 7 and the second axle shaft 9, and the swing angle can be based on the actual size of the engineering vehicle. Select; that is to further play the role of protecting the vehicle axle 8 and tires.

In this embodiment, the balance arm 5 is connected to the rear seat 6 of the axle by bolts to form a "П"-shaped structure. Compared with the existing hydraulic suspension mechanism in which the vehicle axle is directly hinged to the end of the balance arm and locked with a nut shaft end, this structure has high reliability, can withstand greater braking force, and is more suitable for heavy vehicles running at high speed. Moreover, the balance arm 5 , the axle rear seat 6 , the axle 8 , the first axle shaft 7 and the second axle shaft 9 together form a closed box-shaped structure. This greatly improves the safety and reliability of the engineering vehicle when driving at high speed.

The above-mentioned embodiment is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above-mentioned embodiment, and any other changes, modifications, substitutions, combinations, Simplifications should be equivalent replacement methods, and all are included in the protection scope of the present invention.

Claims (8)

1. an engineering truck oil-gas suspension mechanism, it is characterized in that: this hitch comprises pivoting support (1), suspension body (2), oleo-pneumatic suspension oil cylinder (3), equilibrium arm (5), vehicle bridge back seat (6) and vehicle bridge (8), the Internal and external cycle of described pivoting support (1) connects respectively the vehicle frame of suspension body (2) and engineering truck; The upper end of described oleo-pneumatic suspension oil cylinder (3) is connected with the top of suspension body (2), and its lower end is connected with equilibrium arm (5); One end of described equilibrium arm (5) is connected with the lower end of suspension body (2), and its other end is connected with vehicle bridge back seat (6), and described vehicle bridge (8) is also connected with vehicle bridge back seat (6) with equilibrium arm (5) respectively.

2. engineering truck oil-gas suspension mechanism according to claim 1, is characterized in that: the upper surface of described suspension body (2) is provided with the bearing of a protrusion; The lower end of described oleo-pneumatic suspension oil cylinder (3) is connected with the middle part of equilibrium arm (5) by one first bearing pin (11), its upper end is connected with the bearing of suspension body (2) upper surface by one second bearing pin (12), and the axis of described oleo-pneumatic suspension oil cylinder (3) passes through the center of vehicle bridge (8) when the conventional operating mode of vehicle.

3. engineering truck oil-gas suspension mechanism according to claim 1, is characterized in that: described equilibrium arm (5) is bolted with vehicle bridge back seat (6), forms one " П " type structure.

4. engineering truck oil-gas suspension mechanism according to claim 1, it is characterized in that: one end of described equilibrium arm (5) is connected with the lower end of suspension body (2) by an equilibrium arm bearing pin (10), and when oleo-pneumatic suspension oil cylinder (3) is flexible, described equilibrium arm (5), vehicle bridge back seat (6) and vehicle bridge (8) are rotated around equilibrium arm bearing pin (10) together.

5. engineering truck oil-gas suspension mechanism according to claim 1, is characterized in that: the upper surface of the inner ring of described pivoting support (1) and suspension body (2) is bolted, and its outer ring is connected with the vehicle frame of engineering truck by bolt.

6. according to the engineering truck oil-gas suspension mechanism described in claim 1～5 any one, it is characterized in that: described vehicle bridge (8) is connected with equilibrium arm (5) with vehicle bridge back seat (6) with one second axle shaft (9) by one first axle shaft (7) respectively, and vehicle bridge (8) can be rotated around the first axle shaft (7) and the second axle shaft (9).

7. engineering truck oil-gas suspension mechanism according to claim 6, is characterized in that: also comprise and be located at equilibrium arm (5) above for limiting vehicle bridge (8) around the limiting stopper (4) of the first axle shaft (7) and the second axle shaft (9) teeter angle.

8. engineering truck oil-gas suspension mechanism according to claim 6, is characterized in that: the common box-structure that forms sealing of described equilibrium arm (5), vehicle bridge back seat (6), vehicle bridge (8), the first axle shaft (7) and the second axle shaft (9).

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